Patent DE448675C successfully refreshed from Google Patents.
Patent US2935956A successfully refreshed from Google Patents.
US2935956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slag control
Assignee: JACK F GOVAN
•
Filing: 1954-09-22
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Granted: 1960-05-10
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Expires: 1974-09-22
Abstract
No abstract record available.
Inventors
- 👤 Welch Charles Gouldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:21
CPC Classifications
F; F27; F27D; F27D25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A METHOD OF REMOVAL OF RESIDUAL DEPOSITS OF SLAG THAT ACCUMULATE IN A FURNACE DURING NORMAL OPERATION, COMPRISING SPRAYING A MATERIAL ONTO THE INNER SURFACES OF SAID FURNACE WHICH ARE TO BE IN CONTACT WITH THE HOT COMBUSTION GASES, SAID MATERIAL INCLUDING AT LEAST 50% OF A CHLORIDE SALT AND AT LEAST 5% OF AN ADHESIVE MATERIAL COMBINED WITH WATER, SAID MATERIAL BEING CAPABLE OF DRYING ON SAID SURFACES TO FORM A LAYER OF MATERIAL HAVING A LOWER FUSION POINT AND BEING WEAKER AND MORE POROUS THAN THE SLAG, DRYING SAID MATERIAL TO FORM SAID POROUS LAYER, OPERATING SAID FURNACE IN A NORMAL MANNER UNTIL SLAG DEPOSITS FORM ON SAID POROUS LAYER BEYOND A PREDETERMINED THICKNESS, AND LANCING SAID INNER SURFACES UNTIL SAID BUILT-UP DEPOSIT OF SLAG BREAKS OF AT THE INTERFACE OF SAID POROU LAYER AND SAID SLAG LAYER, SAID LANCING RESULTING IN A MORE RAPID AND MORE UNIFORM REMOVAL OF THE SLAG DEPOSIT DUE TO SAID POROUS LAYER.
Claim 2
Independent Claim
160 words
A METHOD OF REMOVAL OF RESIDUAL DEPOSITS OF SLAG THAT ACCUMULATE IN A FURNACE DURING NORMAL OPERATION, COMPRISING SPRAYING A MATERIAL ONTO THE INNER SURFACES OF SAID FURNACE WHICH ARE TO BE IN CONTACT WITH THE HOT COMBUSTION GASES, SAID MATERIAL INCLUDING AT LEAST 50% OF A CHLORIDE SALT AND AT LEAST 5% OF AN ADHESIVE MATERIAL COMBINED WITH WATER, SAID MATERIAL BEING CAPABLE OF DRYING ON SAID SURFACES TO FORM A LAYER OF MATERIAL HAVING A LOWER FUSION POINT AND BEING WEAKER AND MORE POROUS THAN THE SLAG, DRYING SAID MATERIAL TO FORM SAID POROUS LAYER, OPERATING SAID FURNACE IN A NORMAL MANNER UNTIL SLAG DEPOSITS FORM ON SAID POROUS LAYER BEYOND A PREDETERMINED THICKNESS, AND LANCING SAID INNER SURFACES UNTIL SAID BUILT-UP DEPOSIT OF SLAG BREAKS OF AT THE INTERFACE OF SAID POROU LAYER AND SAID SLAG LAYER, SAID LANCING RESULTING IN A MORE RAPID AND MORE UNIFORM REMOVAL OF THE SLAG DEPOSIT DUE TO SAID POROUS LAYER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |